Other mistake: When Bella is in the ER, the x-ray behind Dr. Cullen is upside down.
Continuity mistake: Rosalie's roots go from visible to not visible in different scenes.
Continuity mistake: In the biology lesson after Edward comes back, the extra sitting behind Bella wears different clothing than when they are in the hallway after the lesson.
Continuity mistake: Just after showing Bella his room, Edward takes her up into the tall tree to see the view. In the close-up shot, the tree they are in has a different shape to its trunk and limbs and is actually a different tree type from the one that is shown when the scene cuts to a aerial long-shot and pans away.
Continuity mistake: Victoria is making prints to throw off the cops...she's using sandals but the print is of a bare foot.
Suggested correction: She was barefoot, what sandals?
Continuity mistake: When Edward and Bella are talking by the cliff, its raining and they are both soaked. Next scene shows them completely dry. It's not different days considering they have the same clothes on.
Suggested correction: When Edward is soaked, he is wearing a dark jacket, when he is dry, he has a light grey jacket, totally different.
Continuity mistake: In the prom scene just after Edward and Bella arrive, Bella motions to Jess, who is on a raised area with Mike, away from the dance floor. Bella then turns to wave at Eric and Angela. The shot focuses on them and then cuts back to Bella and Edward. In this shot, Jess can now suddenly be seen dancing behind them.